Windsor L20T manual Machine Troubleshooting, 4-4ENG, Problem, Cause, Solution, No power to machine

MACHINE TROUBLESHOOTING

PROBLEM	CAUSE	SOLUTION
No power to machine		Clean battery cable clamps of any corrosion and
	Poor Cable Connection	tighten. Test voltage at points G to B should be from 34
		to 38 VDC.
		With the main power switch turned on, test voltage at
	Faulty Main Power Switch	points D to B should be from 34 to 38 VDC. If there is
		no voltage remove leads and check switch for
		continuity. Replace if necessary
Pad motor won’t run	Circuit breaker has tripped	Reset circuit breaker (H).
		With main power on, pad lowered to floor, switch bar
	Actuator Safety Switch	pulled up, test voltage at L (wire #2) to B (rear panel)
		should be 34 to 38 VDC. If not, check and adjust or
		replace safety switch as necessary.
		With main power on, pad lowered to floor and drive
		handle squeezed: Test voltage at points F to B and A to
		B should be from 34 to 38 VDC. When the relay is
	Faulty Relay	working it should make a clicking noise as the drive
		handle is squeezed. Replace relay if the test voltage F
		to B is OK. If test voltage F to B is not OK, check all
		wiring to pad motor relay.
Deck lift mechanism not	Circuit breaker has tripped	Reset circuit breaker (J).
working
		With main switch on, test voltage at C (5) to C (2)
		should be 34 to 38 VDC. If not check circuit breaker (J)
Deck switch not working		and main power switch. If the test voltage at C (5) to C
		(2) is 34 to 38 VDC, the voltage at deck switch C (3) to
		C (6) should be 34 to 38 VDC when the deck switch is
		pressed to raise/lower the pad. If not, replace deck
		switch.
Deck actuator not		If the deck switch tested OK, but the deck lift actuator
		still is not working, disconnect the white and black wires
working		to actuator (K) and apply 36 VDC directly to actuator. If
		the actuator does not respond, replace actuator.
Handle switch not		Check power from E (wire #1) to B. Check switch
working		continuity.
Drive Controls	Circuit breaker has tripped.	Check if power at wire #26. If yes, but breaker has no
		power at wire 28 either reset breaker (Q) or replace.
		Check continuity at handle switch for non-traction
	Bad switch (es).	model. Check continuity at propel switch or pad motor
		switch for traction model. Replace as necessary.
	Loose connection.	Check all connections of propel circuit especially at M,
		N, P, R, S & T. Check transaxle connection at U.
		With the drive motor disconnected at V, test the output
		voltage to the drive motor. The output voltage at V
	Faulty potentiometer.	should vary from 0 to 36V at R & S as the control lever
		is squeezed. Resistance of the potentiometer can be
		tested at the leads 4 & 1 found at the potentiometer T.
		The resistance should vary from 0-50K ohms.
		Voltage at T1 (P) to T2 (N) should be from 34 to
	Faulty drive control board.	38VDC. If the voltage at T1 is good but the propel
		motor won't respond, and all the tests above have been
		done, replace the drive control board.

4-4ENG 86038450 04/12/07